This manual is for an old version of Hazelcast Jet, use the latest stable version.

Jet's implementation will automatically convert a stream into a DAG when one of the terminal methods are called. The DAG creation is done lazily, and only if a terminal method is called.

The following DAG will be compiled as follows:

IStreamMap<String, Integer> ints = jet.getMap("ints");
int result =
                 .reduce(0, (l, r) -> l + r);